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Determining valve size.

  1. Jul 29, 2015 #1
    I am struggling with calculating the valve size from a V250 rotary ball valve by Fisher Controls International. The below table states that natural gas is running through the vavle and the following properties apply:

    Natural Gas

    Required volumetric flow rate [@ STP] 2.8 x 106 litre per minute
    Density [@ STP] 0.752 kg per m3
    Specific heat ratio 1.31
    Inlet pressure 20 bar gauge
    Outlet pressure 6 bar gauge
    Inlet Temperature 20 °C

    Would I be right in thinking that I need to find the ratio between the required volumetric flow rate and the density of the valve first?
  2. jcsd
  3. Jul 29, 2015 #2
  4. Jul 29, 2015 #3
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